package com.zy.se;

public class MathDemo {
    public static void main(String[] args) {
        /***Math.sqrt()//计算平方根 *Math.cbrt()//计算立方根 *Math.pow(a, b)//计算a的b次方 *Math.max( , );//计算最大值 *Math.min( , );//计算最小值 */
        System.out.println(Math.sqrt(16)); //4.0
        System.out.println(Math.cbrt(8)); //2.0
        System.out.println(Math.pow(3, 2)); //9.0
        System.out.println(Math.max(2.3, 4.5));//4.5
        System.out.println(Math.min(2.3, 4.5));//2.3
        /*** abs求绝对值 */
        System.out.println(Math.abs(-10.4)); //10.4
        System.out.println(Math.abs(10.1)); //10.1
        /*** ceil天花板的意思，就是返回大的值 */
        System.out.println(Math.ceil(-10.1)); //-10.0
        System.out.println(Math.ceil(10.7)); //11.0
        System.out.println(Math.ceil(-0.7)); //-0.0
        System.out.println(Math.ceil(0.0)); //0.0
        System.out.println(Math.ceil(-0.0)); //-0.0
        System.out.println(Math.ceil(-1.7)); //-1.0
        /*** floor地板的意思，就是返回小的值 */
        System.out.println(Math.floor(-10.1)); //-11.0
        System.out.println(Math.floor(10.7)); //10.0
        System.out.println(Math.floor(-0.7)); //-1.0
        System.out.println(Math.floor(0.0)); //0.0
        System.out.println(Math.floor(-0.0)); //-0.0
        /*** random 取得一个大于或者等于0.0小于不等于1.0的随机数 [0,1) */
        System.out.println(Math.random()); //小于1大于0的double类型的数
        System.out.println(Math.random() + 1);//大于1小于2的double类型的数
        /*** rint 四舍五入，返回double值 * 注意.5的时候会取偶数 异常的尴尬=。= */
        System.out.println(Math.rint(10.1)); //10.0
        System.out.println(Math.rint(10.7)); //11.0
        System.out.println(Math.rint(11.5)); //12.0
        System.out.println(Math.rint(10.5)); //10.0
        System.out.println(Math.rint(10.51)); //11.0
        System.out.println(Math.rint(-10.5)); //-10.0
        System.out.println(Math.rint(-11.5)); //-12.0
        System.out.println(Math.rint(-10.51)); //-11.0
        System.out.println(Math.rint(-10.6)); //-11.0
        System.out.println(Math.rint(-10.2)); //-10.0
        /*** round 四舍五入，float时返回int值，double时返回long值 */
        System.out.println(Math.round(10.1)); //10
        System.out.println(Math.round(10.7)); //11
        System.out.println(Math.round(10.5)); //11
        System.out.println(Math.round(10.51)); //11
        System.out.println(Math.round(-10.5)); //-10
        System.out.println(Math.round(-10.51)); //-11
        System.out.println(Math.round(-10.6)); //-11
        System.out.println(Math.round(-10.2)); //-10
    }
}
